摘要(Abstract):
为了满足混凝土结构健康监测的需求,根据尾波干涉技术对介质内部损伤微小变化的反应灵敏的特性,制备一种埋入式传感器,结合传统外贴式传感器,采用尾波干涉技术,在3种监测模式下监测不同养护龄期混凝土试块的应力,分析应力变化引起的混凝土试块时域信号的尾波相位变化特性,并探讨不同养护龄期的混凝土试块尾波相对波速随应力的变化规律。结果表明:相对于传统外贴式传感器,埋入式传感器监测的混凝土试块的去相关系数较小,并且随着混凝土试块养护龄期的增加,混凝土试块的尾波相对波速逐渐增大,说明埋入式传感器对混凝土内部损伤变化的反应更灵敏,能更好地监测应力;埋入式传感器的埋入对不同养护龄期混凝土试块抗压强度的影响可忽略不计,可以用于实际工程中的混凝土应力监测而不影响混凝土结构自身强度。
关键词(KeyWords):应力监测;埋入式传感器;尾波干涉技术;混凝土;尾波相对波速;去相关系数
基金项目(Foundation):国家自然科学基金项目(52308271);; 深圳市高层次人才科研启动项目(RC2022-004);; 2023年广东省普通高校特色创新类项目(2023KTSCX321)
作者(Author): 范志瑞,谷传耀,秦磊,徐伟伟,孙明,丁蔚健
DOI:10.13349/j.cnki.jdxbn.20240703.001
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